To the Editor.—
It is unfortunate that Drs Melicow and Uson do not favor needling benign renal cysts (236:2546, 1976). Cyst puncture combined with pathologic examination of the aspirate is a simple, safe, and extremely accurate method of differentiating a benign renal cyst from renal carcinoma. Benign cysts are quite common (5% in some autopsy series), and much unnecessary surgery could be avoided if more cysts were punctured.
Merlo RB. Renal Cysts. JAMA. 1977;237(14):1435. doi:10.1001/jama.1977.03270410035011